456 BIRDS OF THE REPUBLIC OF PANAMA — PART 3 



Specimens available include representation in Panama as migrants 

 of four races. The subspecies may be recognized from the brief 

 descriptions that follow, through comparison and check with speci- 

 mens. 



As further discussion, Confopus sordidulus P. L. Sclater was de- 

 scribed in 1859, with Orizaba, Veracruz, as the type locality. Its use 

 here as the species name for the Western Wood Pewee follows that 

 in current literature. (See Phillips and Parker, Condor, 1955, p. 244; 

 Webster, Indiana Acad. Sci., vol. 66, 1956, publ. 1957, p. 337; 

 Phillips, in Phillips, Marshall, and Monson, Birds of Arizona, 1964, 

 p. 91.) In current study of specimens no definite characters appear 

 in those seen from northern and central Mexico to distinguish them 

 as a subspecific group from that currently recognized as veliei in the 

 area from the International Boundary northward in Arizona and New 

 Mexico. Sclater's type specimen of sordidulus from Orizaba in the 

 British Museum (Natural History) should be examined carefully. 

 If it is a bird of the assemblage now accepted as the Western Wood 

 Pewee, then these will continue to be known as the species sordidulus. 

 As the oldest name for this group it also may replace that current 

 for one of the subspecies, possibly veliei. 



CONTOPUS SORDIDULUS SATURATUS Bishop 



Contopiis richardsonii saturatus Bishop, Auk, vol. 17, no. 2, April 1900, p. 116. 

 (Haines, Alaska.) 



Characters. — Darkest of the forms ; dorsal surface definitely 

 darker, especially on the crown ; breast and sides darker gray ; ab- 

 domen white. 



Measurements. — Males (10 from the breeding range in British 

 Columbia, Washington, and Oregon), wing 83.4-90.0 (86.4), tail 

 60.8-66.3 (63.0), culmen from base 14.2-16.5 (15.3), tarsus 13.4- 

 14.6 (13.7), tip of longest upper tail covert to end of tail 29.9-30.8 

 (30.2) mm. 



Females (10 from the breeding range in Oregon, Washington, 

 British Columbia, and Alaska), wing 79.5-88.3 (83.5), tail 59.7-63.8 

 (61.6), culmen from base 14.0-16.1 (15.0), tarsus 12.4-13.5 (12.8), 

 tip of longest upper tail covert to end of tail 27.8-30.8 (29.7) mm. 



Passage migrant from the north, apparently to winter quarters in 

 northern South America; one record possibly of a wintering indi- 

 vidual, March 13, 1971, on Cerro Quia, at the Colombian boundary 

 in eastern Darien. 



Two females collected September 14 and 22, 1961, at the head of 



